RON 



R O S 



The seeds should be sown about the end of 

 March or beginning of the following month, 

 on a bed of light mould, being covered to the 

 depth of about half an inch. In the first sort 

 and varieties the plants mostly appear in the 

 course of six or eight weeks; but in the other 

 kinds often not till the next spring. They should 

 be well weeded and watered, and when suffi- 

 ciently strong be set out in the spring or autumn 

 in nursery-rows, for two or three years, in order 

 to remain to have proper growth for final plant- 

 ing out. 



The cuttings should be made from the young 

 shoots, and planted out in the beginning of au- 

 tumn, in a shady border where the soil is mel- 

 low. They are mostly well rooted in the course 

 of a twelvemonth, when they may be removed 

 into nursen -rows as above. 



The layers should be made from the young 

 wood, being laid down in the autumn, when in 

 the course of the year they mostly become well 

 rooted, and may be taken off and planted out in 

 nurserv-rows as the seedling plants. 



The' suckers, which are produced in plenty 

 from the two first sorts, which may be removed 

 in the early autumn or spring, and planted out 

 in nursery-rows or in beds, to be afterwards re- 

 moved into them. 



The two last, or tender sorts, may likewise be 

 raised from seeds and cuttings, but they must 

 be sown and planted in pots, filled with good 

 mould, to have the assistance of a hot-bed in the 

 stove, by being plunged in it. When the 

 plants have attained a little growth, they should 

 be shaken out of the pots, and planted separately 

 in small pots, filled with the same sort of earth, 

 plunging them in the tan-bed, affording due 

 shade till well rooted, managing them afterwards 

 as other tender stove plants. 



The plants are most tender while young; they 

 should 'therefore be kept in the stove tan-bed 

 till they have acquired strength, when they may- 

 be preserved in the dry stove, with a temperate 

 heat in winter, and be exposed in the open air 

 in .-umnier, in a warm sheltered situation when 

 the. weather is tine. 



The hardy soils have a fine effect in the border 

 clumps and other parts of pleasure-grounds, and 

 the tender kinds afford variety in the stove col- 

 lections. 



R( >HINSON CRUSOE'sCOAT. SeeCACTus. 



ROCAMBOLE. See Allium. 



ROCK-ROSE. See Cisxus.. 



RONDELETIA, a genus containing plants 

 of the woudv exotic stove kind. 



It belongs to the class and order Pvn/rmdria 

 M'niogijnia, and ranks in the natural order of 

 Rvbiacece. 



The characters are: that the calyx is a on 

 leafed perianth, superior, five-parted, acute. 

 permanent: the corolla oue-petalled, funnel- 

 shaped : tube cylindrical, longer than the calyx, 

 bellying a little at top : border five-parted, from 

 reflex flat ; segments roundish : the stamina 

 have five awl-shaped filaments, almost the 

 length of the corolla : anthers simple; the pis- 

 tillum is a roundish, inferior germ : style fili- 

 form, the length of the corolla : stigma bifid : the 

 pericarpium is a roundish capsule, crowned, - 

 two-celled : the seeds several, or sometimes so- 

 litary. 



The species chiefly cultivated is R. Americana, 

 American Rondeletia. 



It rises with a woody stalk ten of twelve feet 

 hi oh, branching out on every side ; the branches 

 covered with a smooth greenish bark : the leaves 

 are oblong, ending in acute points, entire, t lie 

 upper surface lucid green, the under pale ; thev 

 are a little crumpled, and stand alternate : the 

 flowers come out in bunches at the end of the 

 branches, are white, and have little scent. Thc\ 

 appear in autumn, but are not followed by seeds 

 in this climate. 



Culture. — This plant may be increased by 

 sowing the seeds on a moderate hot-bed in the 

 early spring, and when the plants have attained 

 a little growth they should he removed into se- 

 parate pots, being plunged in the bark-bed of 

 the stove, where they are to remain and be ma- 

 naged as other tender exotic plants of a similar - 

 kind.. 



They afford' variety in stove collections. 



ROSA, a genus containing plants of the de- 

 ciduous flowering shrub and evergreen kind. 



It belongs to the class and order Icosandriu 

 Polijgyitia, and ranks in the natural order of 

 Sdnticosce, 



The characters are : that the calyx is a one- 

 leafed perianth : lube ventricose, contracted at 

 the neck ; with the border spreading .five-parted, 

 globular.: segments long, lanceolate-narrow (in 

 some of them two alternate ones appendicled on 

 both sidles : two others, also alternate, naked on . 

 both sides ; the fifth appendicled on one side 

 onlv) : the corolla has five petals, obcordate, 

 the length of the calyx, inserted, into the neck 

 of the calyx : the stamina .have very many fila- 

 ments, capillary, very short, inserted, into the 

 neck of the calyx : anthers three-cornered : the 

 pistilluvn has numerous germs, in the bottom of 

 thecalvx: styles as many, villose, very short, 

 compressed'close by the neck of the calyx, in- 

 serted into the side of the germ : sligmas blunt: 

 there is no pericarpium : is a fleshy berry, tur- 

 binate, coloured, soft, one-celled, crowned with 

 the rude segments, contracted at the neck, 



